The same thing happened to me. I received a call from 202-750-4592 at 6:53pm EST and then a call from 209-263-0460 at 11:02pm EST. I didn't answer, and no one left a message.
I just got a call from the 209-263-0460. I did not answer and there was no message. I did not receive a call from the other # mentioned in the other posts.